ignores future_group_master_log_p

There was a redundant assignement. However, that's the only artifact.
Wrt to future_group_master_log_position, there is no issue.
The counter is supposed to be set at Log_event::exec_event().
It's used only by Innodb for recovery purposes.


sql/sql_repl.cc:
  removing a redundant line which arrived with the revision 1.102.1.7.